Improvement in padlocks



P. BACHER & IE'. DEMING. Padlock.

No. 218,213. Patented Aug. 5,1879.

UNITED STATES PATENT OFFICE.

PETER BAGHER AND FRANK DEMING, OF ALLEGHENY, PENNSYLVANIA.

IMPROVEMENT IN PAoLooKs.

Specification forming part of Letters Patent No. 218,213, dated August5, 1879; application filed June 21, 1879.

To all whom it may concern Be it known that we, PETER BAGHER and FRANKDEMING, of Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inPadlocks; and we do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form part of thisspecification.

Our invention relates to an improvement in padlocks, and it consists inthe combination of a cut ring, two or more groove-d tumblers which catchbetween the ends of the ring, a dividin g-plate provided withguiding-lugs, and springs, as will be more fully described hereinafter.

The accompanying drawings represent our invention.

Figure 1 is a side elevation of our lock with one side removed. Fig. 2is a vertical cross-section of the same.

The lock consists of two plates, A and B, both, when put together,forming the body of the lock. The upper parts of these plates aresemicircular cavities a, for the reception of the movable ring C, fromwhich ring a part is cut out sufciently large to allow the passage of astaple for the attachment of the lock. The ring, when its open side isturned upward, releases the staple to which it may be attached, but whenturned to conceal its opening in the body of the lock becomes fastenedand held by turning the key.

Immediately under the center of the cavity a are two tumblers, b c, ontop of one another, held in place by suitable guides on both plates Aand B, having their upper ends arched in conformity with the cavities inwhich the ring C is held. The upper arched ends of these tumblers slidethe one on the other; but their opposite lower ends are separated by afixed plate, d, which also guides them when, by the key, the tumblersare moved.

Upon the upper end of the plate d there is made a lug, e, on each side,which lugs t in small vertical grooves in the inner sides of thetumblers, so as to guide the tumblers in their movements when moved bythe key. There are also guidingiianges formed inside of the frame A B,which serve to assist in holding` the tumblers in place.

The plate d is held at its lower end by two projecting pins, which entercorresponding recesses in the frame.

Although but two tumblers are here shown, it is evident that any desirednumber can be used.

The springs D have their ends applied to both under ends oi' thetumblers, under and above the plate d, and push them upward into thecut-away part of the ring, when the ring is placed in the properposition.

The tumblers move independently of each other, so that if by some meansor other the upper oneI be pushed back in an attempt to pick the lockthe lower one still holds the ring and prevents its being turned,without which the lock cannot be opened. To accomplish this bothtumblers must be depressed simultaneously, which only can be done withthe key made for the lock and introduced through the key-hole in theplate B.

Having thus described our invention, we claim- In a padlock, thecombination of a frame, A B, ring C, two or more grooved tumblers, b c,entering between the\ends of said ring, springs D, and dividing-plate d,having the guiding lugs or projections e, substantially as shown.

In testimony that we claim the foregoing we have hereunto set our handsthis 16th day of June, 1879.

PETER Y BAGHER. FRANK DEMING.

Witnesses:

A. M. IMBRIE, DAVID DRANE.

